What are the electronic shutter sensor readout speeds of common mirrorless cameras?

Question

I'm asking about electronic shutter sensor readout speed (sometimes informally called the electronic shutter "rate"), meaning the time it takes to scan and read the whole sensor from top to bottom. This is different from shutter speed, which is the exposure time for each pixel. Readout speed is what mainly affects rolling-shutter distortion and is roughly analogous to flash sync limits for an electronic shutter.

I'm especially interested in examples for mirrorless cameras such as Nikon Z, Sony Alpha, and Fujifilm bodies. Are there published measurements for these cameras, and how do they compare with a typical mechanical shutter?

user32811 · Accepted Answer

Shutter rates, as measured by Jim Kasson - blog.kasson.com

typical mechanical shutter      1/250

Nikon Z6                         1/37
Nikon Z7                         1/16
Nikon D850 (full)                1/15
Nikon D850 (crop)                1/40
Sony A9                         1/150
Sony A7RIII (normal mode)        1/15
Sony A7RIII (continuous mode)    1/30
Sony A7III (normal mode)         1/16
Sony A7III (continuous mode)     1/28
Sony A7S (full)                  1/30
Sony A7S (crop)                  1/50
Fujifilm GFX-50S                  1/4

What are the electronic shutter sensor readout speeds of common mirrorless cameras?

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